Learn About Vacuum Brazed Diamond Technology

What is Vacuum Brazed Diamond Technology?

In general terms, brazing is a method of joining materials by using a filling metal to create this joint. For stonemasonry tools, this refers to connecting the part of the tool that performs the operation, the synthetic diamonds, with the steel carrier. This could be, for example, the steel round shape of the body of a blade. Vacuum brazing specifically refers to the use of a furnace and heat to attach a diamond coating to the outside edge of a tool.The below information serves a rough guide to explain this process.

Vacuum Brazed Diamond Manufacturing Process

Manufacturing Step 1

The first requirement is to locate a tool carrier, and the specification will be application led. It is usually a steel body which needs to be cleaned and prepared. For a blade, this will be circular body around 3mm in thickness

Manufacturing Step 2

A dispensing system injects glue drops onto the tool surface. Diamond grits are then applied to the surface. Their specification will be selected based on the intended purpose of the tool. A braze alloy mix is then applied over the grits which contains a reactive metal. This mix usually contains a nickel component. The level of this braze alloy gives the desired grit embedment after brazing.

Manufacturing Step 3

The tool is then heated in a special air-tight brazing furnace at around 1,000C. The joint area between the metal body, braze alloy and diamond grit have direct heat applied to them. The temperature of the furnace is set above the melting point of the braze alloy but below the melting point of the steel body. The molten braze alloy flows into gaps between the other two materials and fuses the diamond crystals to the body of the tool. This forms a strong connection as it cools. This means that the diamond particles are joined at the points on the steel body of the tool that comes into contact with the material being worked. The grits now leave a 'sugar-coated' effect and leave a single layer of diamond on the outside of the tool carrier.

The braze alloy connects the diamond to the tool body
Glue is injected onto the tool body

What Are the Benefits of Vacuum Brazed Stone Tools?

  • Smooth - a single layer of diamond provide clean results
  • Universal - can be used on a wide range of materials - no specific bond required for materials
  • Durable - a strong bond is made through the brazing process extending the life of the tool
  • Speed - exposed diamond on the cutting edges for fast working
  • Flexible - there are few limitations in the design of the tools, meaning they can be designed for diverse need
  • Cost effective - lower production costs than other tooling providing great value

One of the key benefits of vacuum brazing is that production costs are lower than other methods of producing diamond tools. This means that the brazed tools we offer provide customers good value per meter of material being worked. The tools can also be produced for many different applications - the steel bodies can be manufactured in a range of sizes and shapes and the diamonds brazed directly into place.

Top 4 Types of Vaccum Brazed Tooling for Stoneworking

1. Vacuum Brazed Straight Routers

Straight routers are usually produced with electroplated or sintered diamond. However, vacuum brazed routers offer fast cutting ability with a excellent tool life. They are suited for marble and limestone working, they are very popular with architectural masons.

2. Vacuum Brazed Core Drills

Vacuum Brazed Core Drills are a useful tool for work surface fabricators, tilers, and cladding teams. Because they cut faster than sintered core drills, users are more likely to achieve a cleaner chip-free cut.

3. Vacuum Brazed Cutting Blades

Vacuum brazed blades are useful for masons who are cutting varied materials, or masons who are working exclusively with hard limestones or medium hardness marbles. The exposed diamond on the cutting edge ensure as fast clean cut. Users will find that these blades cut just as effectively as electroplated blades but last much longer.

4. Vacuum Brazed Angle Grinder Profiles

These angle grinder profiles are coated with vacuum brazed diamond. They are fast working and can be used with a water fed machine for extra durability.

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